Keep in mind, it is a property of the wave medium, so we have to do something to the string to alter the wave speed. From earlier discussions, we know that tightening the string increases the wave speed.
Infants. Most infants receive the majority of their protein from breast milk or infant formula. The Institute of Medicine recommends babies ages 0 to 6 months consume at least 9.1 grams of protein, and infants ages 7 to 12 months eat at least 11 grams of protein every day.
Many parents of picky toddlers will be relieved to know that 2 cups of dairy foods per day will cover about 120 percent of their protein needs. Here is the protein content of some common foods. Remember, babies need 11 grams a day, and toddlers 13. Milk and yogurt - 8 grams per cup. Cooked chicken - 8 grams per oz.